package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.ser.Serializers;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.rmi.MarshalledObject;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //0.校验各种业务异常情况：收货地址为空、购物车为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart  = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList == null || shoppingCartList.isEmpty()){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //1.向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setAddress(addressBook.getProvinceName()+addressBook.getCityName()
                +addressBook.getDistrictName()+addressBook.getDetail());
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        orderMapper.insert(orders);

        //2.向订单明细表插入n条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId()); //设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);

        //3.清空购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        //4.封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        //通过webSocket想客户端浏览器推送消息 type orderId content
        Map map = new HashMap<>();
        map.put("type",1); //type1 来单提醒 2催单
        map.put("orderId", orders.getId());
        map.put("content", "订单号" + orders.getNumber());

        String json = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception{
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }*/

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单

        //发现没有将支付时间 check_out属性赋值，所以在这里更新
        LocalDateTime check_out_time = LocalDateTime.now();

        //获取订单号码
        String orderNumber = ordersPaymentDTO.getOrderNumber();

        log.info("调用updateStatus，用于替换微信支付更新数据库状态的问题");
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderNumber);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 用户查询历史订单
     *
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(Integer page, Integer pageSize, Integer status) {
        PageHelper.startPage(page, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        Long userId = BaseContext.getCurrentId();
        ordersPageQueryDTO.setUserId(userId);
        ordersPageQueryDTO.setStatus(status);

        //1.查询订单信息 包括下单时间 订单状态 订单金额
        Page<Orders> pageQuery = orderMapper.pageQuery(ordersPageQueryDTO);

        //2.查询订单明细信息 包含商品名称 图片等
        List<OrderVO> list = new ArrayList<>();
        if(pageQuery!=null && !pageQuery.isEmpty()){
            for (Orders orders : pageQuery) { //根据订单id查询订单详情信息
                List<OrderDetail> orderDetailList = orderDetailMapper.getById(orders.getId());
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }
        }
        //3.封装返回类

        return new PageResult(pageQuery.getTotal(), list);
    }

    /**
     * 根据订单id查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        //1.查询order表
        Orders orders = orderMapper.getById(id);
        //2.查询order_detail表
        List<OrderDetail> orderDetailList = orderDetailMapper.getById(id);
        //3.封装返回类型OrderVO
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 取消id订单
     *
     * @param id
     */
    @Override
    public void userCancelById(Long id) throws Exception {
        Orders orders = orderMapper.getById(id);
        //0.效验订单是否真的存在
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //2.商家已接单状态下 或 派送状态下，用户取消订单需要电话沟通商家
        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //3.订单处于待接单状态下取消，需要进行退款
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    orders.getNumber(), //商户订单号
                    orders.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        //1.待支付状态下用户可以直接取消订单
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 用户再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        //再来一单的实现逻辑就是把当前订单的商品重新加入购物车
        List<OrderDetail> orderDetailList = orderDetailMapper.getById(id);
        List<ShoppingCart> shoppingCartList = new ArrayList<>();
        for (OrderDetail orderDetail : orderDetailList) {
            ShoppingCart shoppingCart = ShoppingCart.builder()
                    .name(orderDetail.getName())
                    .image(orderDetail.getImage())
                    .userId(BaseContext.getCurrentId())
                    .dishId(orderDetail.getDishId())
                    .setmealId(orderDetail.getSetmealId())
                    .dishFlavor(orderDetail.getDishFlavor())
                    .number(orderDetail.getNumber())
                    .amount(orderDetail.getAmount())
                    .createTime(LocalDateTime.now())
                    .build();
            shoppingCartList.add(shoppingCart);
        }
        //向购物车表中插入数据
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 管理端查询订单
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        //1.查询订单表 返回分页查询结果
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        //2.封装order为orderVO类
        List<Orders> orders = page.getResult();
        List<OrderVO> orderVOList = new ArrayList<>();
        for (Orders order : orders) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(order, orderVO);
            List<OrderDetail> orderDetailList = orderDetailMapper.getById(order.getId());
            orderVO.setOrderDetailList(orderDetailList);
            //下面获取orderDishes字符串
            // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
            List<String> orderDishList = orderDetailList.stream().map(x -> {
                String orderDish = x.getName() + "*" + x.getNumber() + ";";
                return orderDish;
            }).collect(Collectors.toList());
            orderVO.setOrderDishes(String.join("", orderDishList));
            orderVOList.add(orderVO);
        }
        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 各个状态订单数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        //查询订单表统计订单状态数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        //赋值
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 商家接单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = orderMapper.getById(ordersConfirmDTO.getId());
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款：{}", refund);
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 商家派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null || !orders.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 用户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap<>();
        map.put("type",2); //表示客户催单
        map.put("orderId", orders.getId());
        map.put("content", "订单号" + orders.getNumber());
        String json = JSONObject.toJSONString(map);
        //想客户端浏览器推送消息
        webSocketServer.sendToAllClient(json);
    }

}
